So now we want to focus on what he did after he received the concussion, had his nose broke, and two teeth knocked out.
Who knows what he was thinking, since he already had a concussion.
United becomes responsible anytime they ask anyone to act as their agent.
The Dr. committed no act, that would warrant him being told to leave; other then United being so full of themselves that they didn't know what to do when someone tells them NO.
United was wrong to treat this man this way.
If they wanted to fly 4 of their people, then they shouldn't have let the last 4 people board or made other arrangements.
This can be seen, due to the changes they've already decided to make; so this doesn't happen again.
The "authorities" were not right, in this particular incident.